318 L. K. CEAWSHAY. 



The styli of the main skeleton are famtly, sometimes strongly spined, 

 chiefly at the base, and the majority are curved. The average length 

 is in the first specimen about 200 /x ; in the second about 190 /x. In 

 neither case does it exceed 230 /a, which is a good deal less than Bower- 

 bank's figure shows. Many of the spicules are slightly wider in the 

 middle. The width is very variable, ranging from 4 to 7 ^u, and 

 averaging about 6"5 /x. 



The tylota average in the first specimen about 205 yu by 4*5 /x, in the 

 second about 215 ^u, by 5 fj.. The ends are feebly expanded or often 

 simple and faintly spined. The intermediate portion is smooth, with 

 the central part usually the widest. 



Extremely slender hair-like styli often curved, of about 150 yu in 

 length, irregularly dispersed, are numerous. 



Anisochelae very scarce ; length 22 yu. 



Only very few bipocilli were observed after careful searching. These 

 measure about 7 /x in length, and are of the form figured by Bowerbank 

 for the species. 



Dendoryx robertsoni (Bowerbank). 



At Position 78, one specimen. Form massive, irregular, 

 70 X 50 X 40 mm. in height. Broken from attachment — probably 

 a stone. 



Depth, 49 fath. 



Both in external form and skeleton, the specimen closely agrees with 

 Bowerbank's description of the species. 



Megasdcra. Spined styli averaging about 185 /j. in length, and 

 mostly from 4 to 7 /x in width. Tylota with ends sometimes bluntly 

 pointed, of about the same average length, and 4*5 /j. in width at centre 

 of shaft. 



Microsdera. Sigmata, 33 jm; large isochelae, 33 jm.; small isochelae, 

 18 yw. None of the microsdera are very numerous. 



Dendoryx dujardini (Johnston). 



At Position 49, one specimen, thinly investing a living valve of 

 Pectcn opercularis. 

 „ 67, one specimen, forming small patches on Inachus 



leidodiirus ; with a quantity of brown pigment 

 present. 

 Depth, 47-52 fath. 



The skeleton has a rough arrangement of sinuous multispicular lines 

 with a large number of isolated spicules, irregularly dispersed between 

 them, and supporting a somewhat dense and very confused dermal net- 

 work. The strongyla, of which the ends are often faintly tylote, mostly 



