ISCHNOCHITON. 107 



unequal scales ; central areas nearly smooth in the middle, puncto- 

 striate ; girdle finely scaly, alternately ashy-greenish and green. 

 Length 17 > breadth 10 mill. (Ad.) 



Jamaica. 



Chiton squamulosus AD., Proc. Bost. Soc. Nat. Hist, ii, p. 8 (1845). 

 C. (Isch.) squamulosus SHUTTLW. Bern. Mittheil. 1853, p. 76. 



This is unquestionably the same form I have described above as 

 striolatus. The name squamulosus will therefore become a synonym. 



C. lutulatm Shuttlw. Shell small, elliptical-ovate, somewhat 

 narrower in front; dull olivaceous spotted with white; terminal 

 valves impressed-punctate, toward the margins irregularly concen- 

 trically subcostulate ; jugum not keeled; dorsal areas finely and 

 regularly impressed-punctate, and toward the margins flexuously 

 and irregularly transversely plicatulate. Girdle olivaceous and 

 spotted with white, the scales small, flattened, imbricated. Length 

 12, width 5 mill. (Shuttlw.) 



Porto Rico. 



Chiton (Ischnochiton) lutulatus SHUTTLW., 1. c. p. 76, 1853. 



This was described from a single specimen, and said to differ 

 from C. squamulosis in being narrower with more regular sculpture. 

 I have no hesitation in considering it an absolute synonym of /. 

 gtriolatus. 



C. carribceorum (Cpr.) Smith. (PL 20, figs. 25, 26). Shell 

 lengthened-oval, scarcely carinated, variedly painted, grayish-olive, 

 white, reddish and olivaceous, or purple, sometimes blackish with 

 white markings ; end valves concentrically and roughly granose 

 striate or scaly, central areas ornamented with delicate, curved, 

 flexuous, granose liraj ; lateral areas roughly granose or scaly. 

 Posterior valve slightly concave behind the central apex. Girdle 

 minutely scaly, covered with elongate oval scales pa!e rosy-gray, 

 tessellated with diluted black. Length 27, diam. 9 mill. (Smith.) 



St. Thomas; Fernando Noronlia. 



The above appears to be a manuscript name attached to speci- 

 mens in Cuming's collection which are identical with few shells 

 from Fernando Noronha. The color is. very variable, some speci- 

 mens, when viewed from a distance of twelve inches, appearing 

 olive-gray, speckled with white; others are of a pinkish cream 

 color speckled with red or blotched along the sides in front of the 



