080 STTi, C. ELIOT ON NUDIHRANCTTS [JunO 19, 



out nhont 00 Im^^., breadtli about 27 mm. The jiiitteni of yo^llow 

 mid purplish stripes is still very plain, thouglv the colours hn.ve 

 faded to white and black. The external ninl intern:il ch;irn.cters 

 agree with previous descriptions. The fornnda of the r:vdula is 

 about 57x65.1.1.1.(55 in the longest rows. The rhachi<lian 

 tooth bears one denticle rather high up on either side of the ' 

 central cusp and 5-6 rather low down. The first lateral is clumsy 

 in shape, and bears 4-5 min\ite denticles on its outer edge. Tlie 

 remnining teeth are hamate, with projections behind the base. 

 All except the 10-20 outermost have one or more denticles, often 

 only one, but in this case the tooth never appears bifid. 



LiNGUELLA cixEREA Farran. 

 (Farran, 1. c. p. 334.) 



One specimen obtained from Kelaart ap]">cnrs referable to tliia 

 species. Through the kindness of Prof, llerdman I ha.vo also 

 had an opportunity of examining the type specimen preserved in 

 the IMuseuni of Liverpool University. 



JCelaart's specimen is yellowish grey with dai'ker shades hero 

 and there, and ver}-- flat and broad. Length 25 mm., breadtli 

 21 nun., height 6 mm., breadth of foot 15 nun. The external 

 characters are as described by Farran, but he does not allude t.t) 

 the narrowness of the branchial lamella', which is remai-ktvble in 

 both specimens. They are about 30 in number, and set on the 

 under side of the mantle so as to form a narrow band 2 or 

 3 millimeti-es wide. This band is separated from the maiitle- 

 margin by a clear space, and from the side of the body by ;inother 

 clear space as wide as the band itself. These side-lainelkxj inni 

 into the gills, which in places are hardly distinguisha,ble from 

 them. The true gills are about 25 in number and pi'olouged into 

 ai distinct cleft. On each side of the large round mouth there 

 appeal's to be a process attached to the under side of thetentacidnr 

 shield. There is a groove in the hinder part of the foot. 



The jaA\s are yellow, long and nari-ow, with several rows of 

 denticles, which are most developed on the masticatoiy process. 

 In places there are at least eight rows of them, but they ai-e often 

 indistinct. The i-adula. is decayed and veiy fiagile, but there are 

 at least 40 rows of teeth, and perhaps 50 teeth in ea.ch row on 

 either side of the rhachis. The central tooth is strongly ai-ched, 

 with a moderately long median cusp and 6 or 7 lateral denticles, 

 of which only the highest is on the side of the central cusp as a 

 rule. The first latei'al is lower and broader than the rest, and 

 usually bears 8 rather distinct blunt denticles. The succeeding^ 

 teeth are hamate, and become taller and slenderer in shape and 

 bear more denticles. In the middle of the half row the number 

 of denticles amounts to 18 or 20; then it somewhat decreases, 

 and on the outer teeth the denticles are more minute and less 

 distinct ; but all the teeth, except the outermost of all, bear ti'aces 

 of serrulation. In the broken condition of the radula, however, 

 it is difficult to bi^ sure which ai'e the outeruiojst teeth. This 



