SPURILLA BRAZILIANA MAC FARLAND 9! 



Spurilla braziliana Sp. Nov. 

 Plates XVI, XVII, XVIII and XIX; Figs. 83-96. 



i h . But n ^P ecimen was taken by the expedition, the locality 

 label reading "Riacho Doce, Alagoas, July 2gf 1899." The preset 

 vation of the specimen was rather poor, it having been k led 

 m a distorted position, with the head, tentacles and rhinopho es 

 strongly contracted and the posterior portion of the body re- 

 curved dorsally. The cerata had nearly all fallen off, but were 

 preserved m the bottle. The original color had entirely disap! 

 peared, nor were any notes taken as to the color, dimensions or 

 appearance m life. The animal in the preserved condition had 

 a uniform, pale pinkish coloration. 



EXTERNAL CHARACTERS. 



Dimensions^ The total body length is circa 23.0 mm., of 

 which the length of the foot makes up 18.5 mm., the quite dis- 

 torted head region the remainder. 



Body form. The general body form is slender and somewhat 

 compressed, tapering posteriorly to a short bluntly pointed tail 

 the general body form being similar to that of the other species 

 of the genus. The mouth is everted and reflexed, the whole 

 head region being strongly contracted. The oral tentacles in 

 their contracted state are tapering, with blunt extremities, their 

 basal diameter being 0.5 mm., and approximate length 3.0 mm 



Rhinophores. The strongly contracted rhinophores are per- 

 toliate, the clavus bearing eight prominent leaves, which alternate 

 on the posterior side with an equal number of lower ones that 

 extend forward, half way around the clavus from the posterior 

 median line. 



Cerata. The cerata are lanceolate, flattened, and variously 

 curved, m part due to the action of the preservative but also 

 often showing the S shaped curves common in Spurilla neapoli- 

 tana. The smaller cerata are more rounded and conical in form 

 Ihe cerata are arranged in eight groups along the dorso-lateral 

 margins of the body (PI. XVII, figs. 90, 91). Each of the first five 

 these groups is made up of two slightly curved rows of cerata, 

 the upper ends of the rows approaching each other and uniting 

 to form an arc like figure, borne upon a slight integumentary 

 elevation. The anterior limb of each of these arcs contains more 



